Apparatus for compacting concrete



Jan. 2, 1940. c. L. CADY APPARATUS FOR COMPAGTING CONCRETE Filed Oct. 15, 1937 2 Sheets-Sheet 1 l' l- I: H iui g I I 24 In 22 I l l I /.9 '27 INVENTOR:

I CZ/r/A S A, C00 BY M 0m;

ATTORNEY.

Jan. 2, 1940. c. CADY APPARATUS FOR COMPAGIING CONCRETE Filed Oct. 15, 1937 2 Sheets-Sheet 2 NT R.-

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ATTORNEY.

' 2; Anoth tbs-ea is a, prov I pon'crete'while it is in the trough of a Patented JanQZ, 19 40 P APPARATUS on ooMPAoTING' comm-m J, -Curtis L. Cady, Hollywood, Galif.,' assignor to Robert P. Qa dy, Hollywood, Calif. i l v Application ctober 13, 1937, SerialNo. 168 .'l45

is vastly superior instrength to a thin concrete of great slump. -But the concrete ofsmall slump is very difficult to work. because of its low F fluidity. i j j j r It is fo'und that if a conoretemixis vibrated at a high frequency of vibration it becomesmarkedly more fluid incharacteran'd it is possibleto successfully employ a drier mix of rless' slump 20 and one which results in a finished concrete of much greater strength. Such vibration ,also forces out contained an and therefore eliminates to a large-extent gas cavities which ordinarily reduce, the strength of concrete, .Vibration further compacts the concretebyrearranging the particles; of the mix so that they occupy the smallest volume and presses them tightly together while inthat condition to secure intimate contact of the binding constituent with thesand 3 and rock. "The total effect .of high frequency vibration upon theconcretemix is to produce -a remarkable increase in: the "strength of the fin.-

ished concrete. v

An object of my invention, therefore, is to provide apparatus for;vibrating concrete.

Another objectis to' provide apparatus} for vibrating concrete priorto pouring; v

Another object is to provide apparatus in combination with aciincrete mixer to'vibratethe concrete.

Another object 'of the invention is to provide apparatus for vibrating concrete whileit is'ir the jtroughof a concrete mixer.

(concrete mixer and which includes means for regulating the flow of-conc'rete past thevibrator. A further object is to provide apparatu's for '56 vibrating concrete, which apparatus derives "its I power from the source of powerfor driving the concrete mixer associated therewith.

I Still another object of the invention is{to provide apparatus for vibrating 'concrete'{ in the trough of a concrete j'mixer, and which includes It is known that concrete of the trough.

generally rock, sand, cement, and water; gomg ide apparatus: for vi means 'for energizing the vibrator only when concrete is the trough. v

These and other apparent objects I attain in a manner whichwill be clear'from a consideration of the following description t ke in com 1' n, h he' mpanying drawings,"of

which; p

Fig. 'l is an elevational ,viewofa concrete mixer an'done form of my concrete Vibrating apparatus in combination therewith, the trough being shownin cross-section.

"Fig. .2 is a sectional view" of the trough and vibrating unit taken alongthe line 2- 2 of; Fig. 1

in the direction ofthearrows as shown.

Fig. 3 is a view of the end or the trough showing the gate for controlling flow-of concrete from I Fig.;4is a view, partly in sectionyand partly cut away, showing-the trough" of the concrete mixer and an' alternative-form' of concrete vibrator attached thereto. 1 3

Fig. 5 is asectional view of the apparatus of Fig. 4 taken along the line 5-5-in the'direction of the arrows as shown.

Fig; 6 is a cross-sectional View of the concrete vibrator employed in my apparatus; v

Fig.- '7 is a sectional view ofthe vibrator'of Fig.

'6 taken along the line "1-4. inthe direction of the arrowsas shown. Y

My vibrating apparatus is adapted to be operated in combination with a concrete mixer, one

form oiwhi'chfis illustrated in'lthe drawings and 'designated generally by the numeral 10., The

concrete mixer illustrated comprises a rotatable.

mix ng drum ll supported on the frame lz and driven by the motorl3 through connection-of a spur gear 14 with the peripheral gear' l5 on the drumxlLf The drum ll has an, opening [6 at one end through which is fed the constituents,

to make up the concrete mix. These constituents are fed into the opening by means of the piv otally mounted chute ll which maybe lowered" to receive the material andraised to empty it into the mixing drum. The mixing-drum is provided internallywith'vanes which thoroughly mix the constituents of the concrete when the drum is v rotated. The drum .II has on it'sother end an opening l8throug'h which it discharges the concrete, after mixing has taken'place, into the 5d inclined trough l9'from which'theissuing concrete'dumps into -the l'ocation where it is to be applied or into a conveyance for transporting it to that location. I"

I-pr'eferto' employaconduit or trough-l9 which 5' p upon by the vibrator.

rectly in back' of the vibrator 30 so as not to interfere with the flow of concrete to the vibrator nor with the transmission of vibration rearwardly therefrom. The vane 16 is urged to the right in Fig. 4 by the spring "attached at one end thereto and at the other, end to a housing 18 covering the switch and attached to the shell 12. In its right-most position the vane 16 maintains the switch, 14 in open position by reason of engagement of arm 19, connected to the vane l6, with the operating lever of the switch 14. When concrete flows down the trough IS in the direction of the arrowA it forces vane 16 forward into the position shown in Fig. 4 in dotted lines, and the arm I9 is rotated downwardly operatingthe switch 14 to close the motor circuit. vWhen no more concrete is in the trough IS, the

vane 16 is returned to its right-most position and the circuit of motor 10 is again opened. By this means the Vibrator 30 is operated only When there is concrete in the trough to be acted desired, be employed in the embodiment of Fig. 1 and may be mechanically connected to automatically operate the clutch 62 to cause operation of the vibrator 30 only when concrete is in th trough.

By use of the apparatus of my invention, concrete is compacted prior to being laid in place, and a drier concrete mix of less slump may be successfully poured, resulting in the production of. a stronger finished concrete without the I19? cessity of performing any compactingoperation after pouring. 1

It is understood that various changes and modifications in design and construction of the apparatus disclosed hereinmay be made by those skilled in the art without departing from the spirit of the invention defined in the appended claims.

I claim as my invention:

1. In combination, a trough for the flow of concrete therethrough, a vibrator supported on said trough and positioned, in the path of said vflowing concrete, and meansv including an element adapted to be acted upon by the concrete. in said trough for controlling the operation of said vibrator in such manner that said vibrator A similar vane may, if

- ative said rotating means when said vane is not acted upon by concrete in the trough and for restoring said rotating means to operation when said Vane is acted upon by concrete in the trough.

3. In combination, a concrete mixer including a. source of motive power therefor and an inclined pouring trough through which the mixed concrete flows, a vibrator suspended at one end from said trough and positioned in the path of said flowing concrete, said vibrator including an eccentric weight rotatable about an axis in the vibrator, means connected to and powered by said source of motive power for rotating said weight, and an adjustable gateat the lower end of said trough for regulating the rate of flow of concrete pastthe vibrator.

e. In combination, a concrete mixer including an inclined pouring trough through which the mixed concrete flows, a vibrator suspended at one end from said trough and positioned in the path of said flowing concrete, said vibrator in cluding an eccentric weight rotatable about an axis in the vibrator, means for rotating said weight, and an adjustable gate at the lower end of said trough for regulating the rate of flow of concrete past the vibrator,

5. In combination, a concrete mixer, an elongated inclined pouring trough associated with said mixer along which mixed concrete flows" from said mixer, a vibrator supported on said trough and immersed in said concrete, said vibrator including an eccentric weight rotatable about an axis in the vibrator, means for rotating said weight, and an* adjustable gate on said trough for regulating the rate of flow of concrete past the vibrator.

, CURTIS L. CADY. 

